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US 4,592,673 AGranted
Double-framed "H" form non-stop roadway interchange
OwnerSoo-Yang Leeinventor
Life of this patent
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OwnerSoo-Yang Leeinventor
Estimating the term…
A traffic flow distribution interchange that provides non-stop and streamlined flow of freeway traffic along two crossing routes, and that occupies a relatively small amount of land area. The freeway interchange comprises a non-elevated route and an elevated crossing route which passes over the non-elevated route. Each route is substantially straight and provides traffic flow in two directions. The elevated and non-elevated routes are linked directly by four traffic flow paths along which vehicles can make right-hand turns from one route to the other. The elevated and non-elevated routes are linked indirectly by four additional traffic flow paths comprising configured ramps along which vehicles can make left-hand turns from one route to the other. These configured ramps pass under the elevated route and cross each other, providing unimpeded traffic flow.
A roadway interchange for connecting first and second roadways, comprising (a) a level elevated road section overlying said first roadway, (b) first and second graded road sections connecting said level elevated road section with respective non-elevated portions of said second roadway disposed on either side of said first roadway, (c) first through fourth level curved ramp sections overlying said first roadway, said first and second level curved ramp sections being arranged adjacent to each other on one side of said second roadway, said third and fourth level curved ramp sections being arranged adjacent to each other on the other side of said second roadway, (d) first through fourth level straight ramp sections, said first and third level straight ramp sections being arranged on one side of said first roadway and connecting said first and third level curved ramp sections respectively with said level elevated road section, and said second and fourth level straight ramp sections being arranged on the other side of said first roadway and connecting said second and fourth level curved ramp sections respectively with said level elevated road section, (e) first through fourth graded curved ramp sections, each of said graded curved ramp sections partly underlying said level elevated road section, and (f) first through fourth graded straight ramp sections, said second and fourth graded straight ramp sections being arranged on said one side of said first roadway and connecting said second and fourth level curved ramp sections respectively to said second and fourth graded curved ramp sections respectively, and said first and third graded straight ramp sections being arranged on said other side of said first roadway and connecting said first and third level curved ramp sections respectively to said first and third graded curved ramp sections respectively, wherein the vertical projections of said first level straight ramp section and said second graded straight ramp section are substantially parallel, the vertical projections of said first graded straight ramp section and said second level straight ramp section are substantially parallel, the vertical projections of said third level straight ramp section and said fourth graded straight ramp section are substantially parallel, and the vertical projections of said fourth level straight ramp section and said third graded straight ramp section are substantially parallel.
Dependencies are inferred from the claim text.